Pocket Watch Database


From the American Horology Archive:
Hamilton Grade 990 Pocket Watch Movement

Hamilton Watch Co.

Grade: 990

Manufacturer: Hamilton
Manufacturer Location: Lancaster, Pennsylvania
Movement Serial Number: 330401
Grade: 990
Model: 1
Estimated Production Year: 1905
Run Quantity: 400
Total Production: 12,799
Size: 16s
Jewels: 21j
Jewel Material: Ruby & Sapphire
Jewel Setting: Gold Settings (Screw-Set)
Movement Configuration: Openface
Movement Finish: Nickel
Movement Setting: Lever
Plate: 3/4 Plate
Regulator: Reed
Hairspring: Breguet
Pallet Jewel Material: Sapphire
Standard Dial Type: Double-Sunk
Adjusted: Yes
Adjusted to Position: Yes
Adjusted # of Positions: 5
Adjusted to Temperature: Yes
Adjusted to Isochronism: Yes
Railroad Grade: Yes
Dial Feet Locations: 7.6, 21.8, 38.0, 50.5
Hamilton 16s Dial Feet Research
Data Research: 1953 Hamilton Serial List

Help Us Help Others By Improving the Database:

Does this information describe your movement accurately?

Data Verification Reports

330101
Verification Serial Map
330500

Anonymous · January 28, 2021

Serial Number 330185 was reported as accurate.

Anonymous · November 28, 2020

Serial Number 330366 was reported as accurate.

Anonymous · October 1, 2020

Serial Number 330303 was reported as accurate.

Mobilaero 240 · August 24, 2018

Serial Number 330401 was reported as accurate.

Gimparoo 695 · May 26, 2018

Serial Number 330260 was reported as accurate.

Anonymous · August 25, 2016

Serial Number 330161 was reported as accurate.

Changes since this report was submitted:
Double Roller changed from Yes to No

Anonymous · April 25, 2016

Serial Number 330407 was reported as accurate.

Changes since this report was submitted:
Double Roller changed from Yes to No

Anonymous · November 5, 2014

Serial Number 330183 was reported as accurate.

Changes since this report was submitted:
Double Roller changed from Yes to No

Anonymous · August 17, 2014

Serial Number 330202 was reported as accurate.

Changes since this report was submitted:
Double Roller changed from Yes to No

Anonymous · November 14, 2013

Serial Number 330415 was reported as accurate.

Changes since this report was submitted:
Double Roller changed from Yes to No

Anonymous · August 2, 2013

Serial Number 330354 was reported as accurate.

Changes since this report was submitted:
Double Roller changed from Yes to No

Anonymous · July 26, 2013

Serial Number 330354 was reported as accurate.

Changes since this report was submitted:
Double Roller changed from Yes to No

Anonymous · December 6, 2012

Serial Number 330161 was reported as accurate.

Anonymous · December 6, 2012

Serial Number 330161 was reported as accurate.

Anonymous · December 4, 2012

Serial Number 330161 was reported as accurate.

Hamilton Grade 990 Pocket Watch Movement